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Ways to achieve optimum utilization of waste gas heat in cement kiln plants with cyclone preheaters

Conference:

Abstract

Kiln exit gases and the exhaust gases from clinker coolers often cannot be fully utilized in drying plants. In such cases a part of the heat content of the gases should be utilized for water heating. In addition, it is possible to utilize the waste gas heat in conventional steam boilers, with which, depending on design, it is possible to generate electricity at a rate of between 10-30 kWh/t (net output). A new and promising method of utilization of waste gas heat is provided by precalcining systems with bypass, in which up to 100% of the kiln exit gases can be economically bypassed and be utilized in a steam boiler, without requiring any cooling. A development project, already started, gives information on the operational behaviour of such a plant and on the maximum energy recoverable. Alternatively, the bypass gases may, after partial cooling with air or preheater exit gas, be dedusted and then utilized in a grinding/drying plant. Furthermore, they can be used in the cement grinding process for the drying of wet granulated blastfurnace slag or other materials. For this it is not necessary to dedust the bypass gases.
Authors:
Publication Date:
Feb 01, 1986
Product Type:
Conference
Report Number:
CONF-8509261-
Reference Number:
DE-86-010665; EDB-86-183137
Resource Relation:
Journal Name: Zem.-Kalk-Gips, Ed. B; (Germany, Federal Republic of); Journal Volume: 39:2; Conference: VDZ congress on process engineering in cement fabrication, Duesseldorf, F.R. Germany, 23 Sep 1985
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 01 COAL, LIGNITE, AND PEAT; BYPASSES; WASTE HEAT UTILIZATION; CEMENT INDUSTRY; KILNS; CALCINATION; DESIGN; DRYING; EFFICIENCY; HEAT TREATMENTS; SLAGS; WASTE HEAT BOILERS; BOILERS; CHEMICAL REACTIONS; DECOMPOSITION; INDUSTRY; PYROLYSIS; THERMOCHEMICAL PROCESSES; WASTE PRODUCT UTILIZATION; 320304* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization; 014000 - Coal, Lignite, & Peat- Combustion
OSTI ID:
5067550
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: ZKGBD
Submitting Site:
DE
Size:
Pages: 75-79
Announcement Date:

Conference:

Citation Formats

Steinbiss, E. Ways to achieve optimum utilization of waste gas heat in cement kiln plants with cyclone preheaters. Germany: N. p., 1986. Web.
Steinbiss, E. Ways to achieve optimum utilization of waste gas heat in cement kiln plants with cyclone preheaters. Germany.
Steinbiss, E. 1986. "Ways to achieve optimum utilization of waste gas heat in cement kiln plants with cyclone preheaters." Germany.
@misc{etde_5067550,
title = {Ways to achieve optimum utilization of waste gas heat in cement kiln plants with cyclone preheaters}
author = {Steinbiss, E}
abstractNote = {Kiln exit gases and the exhaust gases from clinker coolers often cannot be fully utilized in drying plants. In such cases a part of the heat content of the gases should be utilized for water heating. In addition, it is possible to utilize the waste gas heat in conventional steam boilers, with which, depending on design, it is possible to generate electricity at a rate of between 10-30 kWh/t (net output). A new and promising method of utilization of waste gas heat is provided by precalcining systems with bypass, in which up to 100% of the kiln exit gases can be economically bypassed and be utilized in a steam boiler, without requiring any cooling. A development project, already started, gives information on the operational behaviour of such a plant and on the maximum energy recoverable. Alternatively, the bypass gases may, after partial cooling with air or preheater exit gas, be dedusted and then utilized in a grinding/drying plant. Furthermore, they can be used in the cement grinding process for the drying of wet granulated blastfurnace slag or other materials. For this it is not necessary to dedust the bypass gases.}
journal = {Zem.-Kalk-Gips, Ed. B; (Germany, Federal Republic of)}
volume = {39:2}
place = {Germany}
year = {1986}
month = {Feb}
}